Your Guide to Choosing the Best Consumer Unit

As you may already be aware, here at Expert Electrical, we have a panel of experts who are ready and willing to take your call and answer any and all questions you may have. This is one of our promises to our customers, and we are glad to say that we have been able to fulfill and keep this promise for years.

One of the aspects that we like to prioritise is answering our customers’ questions about certain products and their usefulness – such as consumer units as well as RCDs, circuit breakers, and RCBOs. If you have questions or concerns about the above-mentioned products, we’re here to give you the answers you need.

The basics on consumer units

 Consumer Unit

Almost every property which has an electric supply – which is most modern properties today – will have a consumer unit in order to distribute the proper amount of electricity to the different circuits in the property. A consumer unit has a number of important purposes, but one of its most essential purposes is to enable the use of a variety of circuits which can also be protected individually by a circuit breaker.

For instance, your property can have a separate electricity supply for the upstairs area and the downstairs area, and your property can even have a separate electricity supply for the outdoors or for its exteriors. This is where the importance of a consumer unit comes in, because it allows different circuits to be used for these electricity supplies.

The consumer unit is basically the centre point for your electricity supply – it supplies the essential wiring system for whatever electrical sources you may have in your property, building, or household, which normally includes lighting, plugs and sockets, and so on.

The modern use of consumer units

When they first came out, consumer units originally housed electrical fuses and were also known by the name ‘fuse boards.’ But today, things are a bit different in that miniature circuit breakers (also referred to as MCBs) have significantly replaced the original fuses. So if there is ever an electrical overload, the miniature circuit breaker (MCB) can be easily reset by you or anyone with a simple flick of the switch. A fuse, however, would have to be replaced (it should be taken out first, of course) by a professional, and the professional should also be in charge of rewiring it. In certain cases, this can cost a bit of expense. But MCBs and circuit breakers fulfill an important purpose, particularly when it comes to protecting your property or household from fires and other accidents.

Modern Consumer Units

Another purpose for a circuit breaker would be for the disconnection of the supply of electricity, which allows you or someone else to safely and easily change or replace a light bulb, replace a switch or plug socket, and more.

Ensuring safety for your property

If you would like your property’s safety to be further enhanced with the proper circuit protection, you can make use of a safety device which you can use for the disconnection of electricity. This is particularly useful if there is an actual imbalance or disparity in the current of electricity.

Property Safety

The safety device we are speaking about is called a residual current device, also known as an RCD. This special safety device can provide you and your property with an extra layer of protection because it has the ability to trip out in a much faster manner compared to the normal or standard circuit breaker. The RCD, or residual current device, not only provides this additional layer of protection – it can also save lives because it is able to disconnect in such a quick way that it prevents humans from suddenly being shocked by electricity. And, with the recent enforcement of regulations, particularly the 17th edition regulation, it is required nowadays for there to be a residual current device or RCD installed in a consumer unit. However, you should also know that rather than using an RCD, you can also make use of an RCBO (a device which is a combination of a miniature circuit breaker and an RCD).

Details on Chint’s consumer units

Chint is one manufacturer which has been specialising in miniature circuit breakers, circuit breakers, and other consumer units for years. The brand has always been preferred by electricians and other electrical experts, and for good reason.

One common and popular consumer unit produced and manufactured by the Chint brand is distinguished by its make-up, since it is made from Acrylonitrile Butadiene Styrene, or ABS. This polymer is known for its flame retardant properties, and it follows that it has a great insulation property when it comes to electricity as well. These properties make it an ideal polymer or material for extra protection.

But whilst ABS is a great choice of material for consumer units, consumer units are still also made from steel. A consumer unit made from steel is usually maximised in industrial locations and properties, or if armoured cable is in use. A steel consumer unit is usually shaped like a box, and it is accompanied by a lid that is of a polycarbonate transparent material. It also comes in a variety of sizes.

More on small units and large units

If you are interested in smaller consumer units, there is one kind that is popular with many customers. One example of a smaller unit for circuit protection is a garage unit, and this comes with a single circuit breaker and a residual current device or RCD. If you are interested in a larger consumer unit, on the other hand, you have the option of choosing double-stacked units (usually comprised of two residual current devices along with a main switch) – and this provides ample circuit protection for as much as 32 electrical circuits. Larger consumer units like these are most appropriate and used more often for industrial settings as well as commercial settings.

The conclusion

At the end of the day, the consumer unit is an altogether crucial component, being the primary electricity distributor in any household or property. It would be a risk and would pose a danger if you only have a single circuit which runs through your household or property without any circuit protection. It’s easy to realise the usefulness and impact of the proper consumer unit that contributes to circuit protection, because it has saved – and continues to save – a good number of lives each year.

How To Achieve The Best Circuit Protection

RCBOs (residual current circuit breaker with overload protection) incorporate the latest features in safety and comply with the most up to date wiring policies and regulations. They operate on earth fault and current overload situations which means they operate like a combined MCB and RCD at the same time in one single pole device. On top of all that, the device will work perfectly while tripping safely in a real situation or while testing, even if locked in an on or off state.

RCBO

RCBOs can slot into the existing space of an MCB into your consumer unit as they are only one modular width at 18mm wide. They come with ample cabling that is also colour coded for easy installation. They are available in an assortment of tripping varieties that include B or C type both with a tripping sensitivity of 30mA. The breaking capacity is 10kA as standard.

Alternatively for non-consumer unit applications you could opt for a double pole RCBO that has single pole and neutral in two modular spacings making it 36mm wide.

NBH8LE-40

When choosing the right RCBO for your circuit you should always make sure that the current rating of the device is lower than that of the cable used. This allows for faster tripping in case the cable starts overheating, maintaining the cable’s integrity but you should also consider increasing overload protection by installing an additional monitoring relay separately just to be on the safe side.

Expert Electrical will assist in you indeed in your quest for added safety in your next electrical project.